Citirik, Mehmet Conjunctival impression cytology in non-proliferative and proliferative diabetic retinopathy. [electronic resource] - International journal of ophthalmology 2014 - 321-5 p. digital Publication Type: Journal Article ISSN: 2222-3959 Standard No.: 10.3980/j.issn.2222-3959.2014.02.23 doi